Thanks mate I really appreciate it.
So the grounds of the relays aren't actually grounded just joined together, then the diode, then pin 15?
Sorry again 😅
My apologies, Electrics are not my strong point.
For the Center Diff interlock setup, Pin 15 needs to be connected to the Ground on BOTH Harrop relays yes? Also @slopoke mentioned needing to add a diode to prevent the CDL lamp being dimmed, is this also correct?
Correct. Likewise the factory wiring set up won't allow power to either locker without the center diff locked first.
There must be a good reason Toyota did it this way and still do to this day. Maybe its super extra mega bad for the drive train to have just the front locked?
I also have heard...
Sorry for my ignorance. I am terrible with electrical diagrams.
What does the square in the bottom right corner of the diagrams represent? With pin numbers 85, 86, 87 etc.
Sorry again just want to understand this as I'm about to undertake the same thing.
Cheers!
Lachy